One of the basic things one does while configuring a Windows system is to enable viewing hidden files. So basically it is impossible to hide files by making them "hidden". What helps against most nosy people though is to make

Apart from alternate data streams, there is another, perhaps easier way to hide files within others. All you need for it is WinRar (download the 32 or 64 bit version, depending on what operating system you use). To simplify things,

There is a feature in NTFS data system that lets you easily hide your files from nosy people using your computer which is called Alternate Data Streams. What they basically do is to hide files behind others, using them as